Creating a Striped Volume

A striped volume contains at least one plex that consists of two or more subdisks located on two or more physical disks. For more information on striping, see Striping (RAID-0).

To create a striped volume, use the following command:

For example, to create the 10-gigabyte striped volume volzebra, in the disk group, mydg, use the following command:

This creates a striped volume with the default stripe unit size (64 kilobytes) and the default number of stripes (2).

You can specify the disks on which the volumes are to be created by including the disk names on the command line. For example, to create a 30-gigabyte striped volume on three specific disks, mydg03, mydg04, and mydg05, use the following command:

To change the number of columns or the stripe width, use the ncolumn and stripeunit modifiers with vxassist. For example, the following command creates a striped volume with 5 columns and a 32-kilobyte stripe size:

Creating a Mirrored-Stripe Volume

A mirrored-stripe volume mirrors several striped data plexes.

To create a striped-mirror volume, use the following command:

Alternatively, first create a striped volume, and then mirror it as described in Adding a Mirror to a Volume. In this case, the additional data plexes may be either striped or concatenated.

Creating a Striped-Mirror Volume

A striped-mirror volume is an example of a layered volume which stripes several underlying mirror volumes.

To create a striped-mirror volume, use the following command:

By default, VxVM attempts to create the underlying volumes by mirroring subdisks rather than columns if the size of each column is greater than the value for the attribute stripe-mirror-col-split-trigger-pt that is defined in the vxassist defaults file.

If there are multiple subdisks per column, you can choose to mirror each subdisk individually instead of each column. To mirror at the subdisk level, specify the layout as stripe-mirror-sd rather than stripe-mirror. To mirror at the column level, specify the layout as stripe-mirror-col rather than stripe-mirror.